SPOTPOS¶

The SPOTPOS card is used in conjunction with SPOTBEAM, SPOTDIR, SPOTTIME and SPOTTRAN to define multiple beam spots. A new primary is created randomly in any of the listed beam spots according to their respective weight or in sequential order. See SPECSOUR SPECSOUR.

Warning : These five cards are activated by indicating SDUM = BEAMSPOT in the SPECSOUR card. Barring this, the spot cards will be discarded.

See also SPOTBEAM, SPOTDIR, SPOTTIME, SPOTTRAN

WHAT(1): x-position of the beam spot
Default: no default
WHAT(2): y-position of the beam spot
Default: no default
WHAT(3): z-position of the beam spot
Default: no default
WHAT(4) > 0.0:: rectangular beam width in x-direction (cm) or maximum beam radius (cm) depending on WHAT(6)
< 0.0:: Gaussian beam profile in the x-direction. |WHAT(4)| is the FWHM in cm
= 0.0:: pencil beam along x
Default: 0.0
WHAT(5) > 0.0:: rectangular beam width in y-direction (cm) or minimum beam radius (cm) depending on WHAT(6)
< 0.0:: Gaussian beam profile in the y-direction. |WHAT(5)| is the FWHM in cm
= 0.0:: resets to default if no annular beam spot requested (see WHAT(6)), ignored otherwise
Default: same as x-width if no annular beam spot requested (see WHAT(6)), no y-width otherwise
WHAT(6) > 0.0:: flag for a rectangular beam spot
< 0.0:: flag for an annular beam spot
= 0.0:: ignored
Default: 0.0
SDUM: beam spot number (free format)
Default: \(n\), the number of last defined spot

Notes

If no SPOTPOS card is issued for an otherwise (via SPOTBEAM) defined beam spot, the spot position and position spread are taken from the BEAM and BEAMPOS cards